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Two new Sigma MACRO lenses for digital SLR cameras

Sigma Japan announced two new Macro lenses optimised for digital SLR cameras with available mounts for Canon, Nikon, Pentax, Minolta and Sigma.
The Macro 50mm F2.8 EX DG has a minimum focusing distance of 7.4 inch while the MACRO 105mm F2.8 EX DG has minimum focusing distance of 12.3 inch.
Optional Sigma accesoires for those lenses are Multi Coated UV filters and Circular Polarisation filters ...
Two new Sigma MACRO lenses for digital SLR cameras - digital camera and photography news

PRESS SUMMARY

The Sigma MACRO 50mm F2.8 EX DG

Sigma launched first standard 50mm Macro lens in 1990. This was succeeded by the 50mm f/2.8 EX Macro in 1998 which proved even more popular with photographers, benefiting from improved build and optical quality.
The advent of digital SLR's requires optimum lens performance and therefore the very latest optical technology has been incorporated in the production of the New Macro 50mm f/2.8 EX DG. This ideal standard lens sets the benchmark for digital SLR cameras.
Macro lenses require a high imaging performance for photographing objects with digital SLR cameras.
The new advanced lens design corrects various aberrations. This macro lens is specially coated to get the best color balance whilst cutting down ghost caused by reflections from the digital image sensor. This lens provides the utmost correction against lateral chromatic aberration which is a serious problem for digital SLR cameras.

Floating Focusing System
Floating Focusing system that enables this lens to photograph objects precisely in entire focusing range.

Standard 50mm lens for digital SLR cameras.
This standard macro lens enables you to enjoy the communication with subject. When viewing through the camera¬Āfs finder, you are able to move your subject, and make precise adjustment. It has a close working distance and it is very convenient for taking close-up pictures of a fossil, or other inanimate things for example. This lens would have an equivalent field of view of an 85mm macro lens on a digital SLR camera (when used with the SD10).

Minimum aperture of F/45
Although the depth of field this medium telephoto is shallow, sometimes would be necessary to have greater depth of field, because it is difficult to take a sharp picture of a subject and the background at the maximum aperture. Minimum aperture of F/45 (F/45 for Sigma, Canon and Konica Minolta mounts or F/32 (F/32 for Nikon and Pentax mounts) provides greater depth of field.

A screw-in lens hood
A screw-in hood is included, for convenient use of circular polarizing filters.


THE SPECIFICATIONS
*  Focal Length :50mm
*  Minimum Aperture :F/45 (for Sigma, Canon and Konica Minolta mounts) F/32 for Nikon and Pentax mounts
*  Lens Construction : 10 Elements in 9 Groups
*  Angle of View :46.8degree
*  Number of Diaphragm Blades :7pcs
*  Minimum Focusing Distance :18.9cm (7.4in.)
*  Maximum Magnification : 1:1
*  Filter Size :55mm
*  Lens Hood :Screw-in Type
* Dimensions :Max. Diameter 71.4mm (2.8in.)X Length 66.5mm (2.6in.)
*  Mounts (AF) :Sigma, Canon, Nikon, Pentax, Minolta
*  Weight :320gr/ 11.3oz

Optional Accessories

SIGMA EX Multi-Coated UV 55 mm Filter
SIGMA EX Wide Multi-Coated Circular PL 55 mm Filter




The Sigma MACRO 105mm F2.8 EX DG

MACRO 105mm F2.8 EX DG allows greater working distance between the lens and subject. High contrast and excellent image quality are made possible in all shooting ranges. This macro lens is ideal for digital SLR cameras as well as film SLR cameras.
Reduces flare and ghost
This new medium telephoto macro lens employs a new design concept for digital SLR cameras. Its new lens power layout produces an excellent optical performance and also reduces flare and ghost. This new lens is designed to reduce the influence of harmful light caused by reflections from the digital image sensor.

An easy to use 105mm medium telephoto lens
MACRO 105mm F2.8 EX DG lens is very suitable for taking pictures in nature and it enables to use of natural light conditions or flash.
The greater working distance of this lens is very advantageous when taking the picture of a flower among the branches or an insect. You do not shake your subject when you want to take its precise details without blurring by using a tripod.
The narrow angle of view is a great aid for simplifying backgrounds and shallow depth of field makes it easier to handle the composition. This lens would have an equivalent field of view of a 178mm telephoto macro lens on a digital SLR camera (when used with the SD10).

Minimum aperture of F/45
Depth of field of medium telephoto macro lenses is generally very shallow; however, Sigma, Canon and Konica Minolta mounts of this lens have a minimum aperture of F/45 (or F32 for Nikon and Pentax mounts) for incredible depth of field

Screw-in lens hood
A screw-in hood is included, for convenient use of circular polarizing filters. It is possible to attach an f77mm filter in front of the lens hood.

Dual Focus (DF) system
This lens also incorporates a Dual Focus (DF) system that is designed to make the lens easy to hold during auto focusing. The large focus ring offers smooth and positive action whilst focusing manually.

THE SPECIFICATIONS
*  Focal Length :105mm
*  Minimum Aperture :F/45 (for Sigma, Canon and Konica Minolta mounts) F/32 for Nikon and Pentax mounts
*  Lens Construction :11 Elements in 10 Groups
*  Angle of View :23.3degree
*  Number of Diaphragm Blades :8pcs
*  Minimum Focusing Distance :31.2cm (12.3in.)
*  Maximum Magnification :1:1
*  Filter Size :58mm
*  Lens Hood :Screw-in Type
*  Dimensions :Max. Diameter 74mm (2.9in.) X Length 97.5mm (3.8in.)
*  Weight :457gr/ 16.1oz
*  Mounts (AF) :Sigma, Canon, Nikon(D), Pentax, Minolta


Optional Accessories

SIGMA EX Multi-Coated UV 58 mm Filter
SIGMA EX Wide Multi-Coated Circular PL 58 mm Filter
August 26, 2004
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